22991353641 has 9 divisors (see below), whose sum is σ = 33210390109. Its totient is φ = 15327265836.

The previous prime is 22991353631. The next prime is 22991353661. The reversal of 22991353641 is 14635319922.

The square root of 22991353641 is 151629.

It is a perfect power (a square), and thus also a powerful number.

22991353641 is a `hidden beast` number, since 2 + 29 + 91 + 3 + 536 + 4 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 22991353641 - 2¹⁹ = 22990829353 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22991353631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 429616 + ... + 480158.

Almost surely, 2^22991353641 is an apocalyptic number.

22991353641 is the 151629-th square number.

22991353641 is the 75815-th centered octagonal number.

It is an amenable number.

22991353641 is a deficient number, since it is larger than the sum of its proper divisors (10219036468).

22991353641 is an frugal number, since it uses more digits than its factorization.

22991353641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101092 (or 50546 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The spelling of 22991353641 in words is "twenty-two billion, nine hundred ninety-one million, three hundred fifty-three thousand, six hundred forty-one".